Updated Home (markdown)

Home.md

@@ -18,7 +18,7 @@ Therefore I ask you (as a User or Collaborator) to take the role of first level
 
 <h3>Reporting compilation issues</h3>
 
-[Compilation instructions](https://github.com/f4exb/sdrangel/wiki/Compile-from-source-in-Linux) are given in a  particular reference context: Ubuntu 18.04 with prerequisites installed. It is very unlikely that problems occurring in this context will reach the master branch. However as this is source code I (as the Maintainer) cannot prevent you (as the User or Collaborator) from trying to compile it in a different context. However in this case you must show evidence that something is wrong in the code. Throwing out the compiler output is clearly not sufficient.
+[Compilation instructions](https://github.com/f4exb/sdrangel/wiki/Compile-from-source-in-Linux) are given in a  particular reference context: Ubuntu 20.04 with prerequisites installed. It is very unlikely that problems occurring in this context will reach the master branch. However as this is source code I (as the Maintainer) cannot prevent you (as the User or Collaborator) from trying to compile it in a different context. However in this case you must show evidence that something is wrong in the code. Throwing out the compiler output is clearly not sufficient.
 
 <h3>Reporting run time issues</h3>
 
@@ -27,7 +27,7 @@ An SDR application is complex having close interaction with hardware devices mos
 <h3>Reference environments</h3>
 
 This corresponds to the environments for which the artifacts are built. There are just two of them:
-  - Linux Ubuntu 18.04 moving progressively to Ubuntu 20.04
+  - Linux Ubuntu 20.04
   - Windows 10
 
 <h2>Snap and Flatpak</h2>
@@ -37,7 +37,6 @@ You will find `flatpak` and `snap` folders in the source tree. They have been co
 <h2>Continuous Integration and Delivery</h2>
 
 At present this is done using [Appveyor](https://www.appveyor.com/) and is driven by the [.appveyor.yml](https://github.com/f4exb/sdrangel/blob/master/.appveyor.yml) file. The build is run at Appveyor premises on virtual machines which profile may be found here:
-  - [Linux (deprecated)](https://www.appveyor.com/docs/linux-images-software/) Ubuntu 18.04 up to v4.14.9 - there are installation issues. See https://github.com/f4exb/sdrangel/issues/524#issuecomment-646966704 for a workaround
   - [Linux](https://www.appveyor.com/docs/linux-images-software/) Ubuntu 20.04 from v4.14.10
   - [Windows](https://www.appveyor.com/docs/windows-images-software/) with Visual Studio 2017